Towards the end of Lay Down Your Arms (BBC, tx. 23/5/1970), writer Dennis
Potter includes a joke about the 1950s spy scandals, when we learn that an
intelligence briefing is to be given by a "...fellow by the name of Philby". Ian
Curteis begins his script for Philby, Burgess & Maclean (ITV, tx. 31/5/1977)
in a similar fashion, with the casual revelation that the man being briefed to
investigate a Russian defector's claims about high-ranking KGB moles in the
British Secret Service is actually Philby himself.

Covering the years between the Volkov incident of 1945 and the 1955 press
conference in which Philby flatly denied being the 'third man', Philby, Burgess
& Maclean is as lean, compact and economical as its title suggests. With
admirable directness and clarity, it looks at how the KGB activities of Harold
'Kim' Philby, Guy Burgess and Donald Maclean came to be unmasked and their
eventual defection to Moscow. The main emphasis is on Philby, played in resolute
fashion by Anthony Bate, in an interpretation that foregrounds matter-of-fact
naturalism, eschewing the superficial charisma and bonhomie usually ascribed to
the most famous of the three spies.

Derek Jacobi is customarily engaging and twitchy as Burgess, while Michael
Culver really stands out in a richly nuanced performance as the increasingly
desperate Maclean. Although the three title characters never appear
simultaneously, Jacobi and Culver share a number of fine scenes together,
bringing out the best in Curteis's sharp dialogue. The best of them is a
melancholy four-minute sequence filmed in a single take, in which the two men
reminisce while planning their defection during a park stroll. Gordon Flemyng's
low-key but assured direction is very effective here, and also makes the most of
Arthur Lowe's amusing cameo as Herbert Morrison, the then Foreign Secretary.

When repeated in 2002, the play was, said Curteis, still relevant for its
exploration of whether we "owe a loyalty stronger and deeper than to our own
country". Of the many dramas about the Cambridge spy ring, Philby, Burgess &
Maclean remains particularly notable for emphasising the fear of nuclear war,
plausibly presenting it as a contributing factor for their treachery. In other
respects however, history has been unkind to this drama, from its dated (and
uncredited) music score, to the fact that it was made some two years before
Anthony Blunt's role in the spy ring was revealed.